|Season|Tier|Division|Place|
|---|---|---|---|
|1991–98|5|Regional|—|
|1998/99|4|3ª|8th|
|1999/00|4|3ª|5th|
|2000/01|4|3ª|7th|
|2001/02|4|3ª|9th|
|2002/03|4|3ª|9th|
|2003/04|4|3ª|2nd|
|2004/05|4|3ª|8th|
|2005/06|4|3ª|6th|

Question: what is the difference between the team ranking of the 1998-99 season and the 2003-04 season?
Answer: 6